const_padding_node.h

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#pragma once
 
#include <cstddef>
#include <memory>
#include <nlohmann/json_fwd.hpp>
#include <string>
 
#include "sdfg/data_flow/data_flow_graph.h"
#include "sdfg/data_flow/data_flow_node.h"
#include "sdfg/data_flow/library_node.h"
#include "sdfg/data_flow/library_nodes/math/tensor/tensor_layout.h"
#include "sdfg/data_flow/library_nodes/math/tensor/tensor_node.h"
#include "sdfg/data_flow/pointer_metadata.h"
#include "sdfg/element.h"
#include "sdfg/function.h"
#include "sdfg/graph/graph.h"
#include "sdfg/passes/expansion/lib_node_expander.h"
#include "sdfg/serializer/json_serializer.h"
#include "sdfg/structured_control_flow/block.h"
#include "sdfg/symbolic/symbolic.h"
 
namespace sdfg {
namespace math {
namespace tensor {
 
inline data_flow::LibraryNodeCode LibraryNodeType_ConstPadding("ml::ConstPadding");

class ConstPaddingNode : public TensorNode {
private:
    symbolic::MultiExpression pads_;
    TensorLayout y_layout_;
    TensorLayout x_layout_;
 
public:
    ConstPaddingNode(
        size_t element_id,
        const DebugInfo& debug_info,
        const graph::Vertex vertex,
        data_flow::DataFlowGraph& parent,
        const symbolic::MultiExpression& pads,
        const TensorLayout& y_layout,
        const TensorLayout& x_layout,
        const data_flow::ImplementationType& impl_type = data_flow::ImplementationType_NONE
    );
 
    static int constexpr Y_INPUT_IDX = 0;
    static int constexpr X_INPUT_IDX = 1;
    static int constexpr VAL_INPUT_IDX = 2;
 
    const symbolic::MultiExpression& pads() const;
 
    const symbolic::Expression& get_lower_pad(int index) const;
    const symbolic::Expression& get_upper_pad(int index) const;
 
    const TensorLayout& y_layout() const;
    const TensorLayout& x_layout() const;
 
    virtual void validate(const Function& function) const override;
 
    virtual bool supports_integer_types() const override;
 
    virtual passes::LibNodeExpander::ExpandOutcome
    expand(passes::LibNodeExpander::ExpandContext& context, structured_control_flow::Block& block) override;

    virtual std::string toStr() const override;

    virtual symbolic::SymbolSet symbols() const override;

    virtual symbolic::Expression flop() const override;

    virtual data_flow::PointerAccessType pointer_access_type(int input_idx) const override;

    virtual std::unique_ptr<data_flow::DataFlowNode>
    clone(size_t element_id, const graph::Vertex vertex, data_flow::DataFlowGraph& parent) const override;
 
    virtual void replace(const symbolic::Expression old_expression, const symbolic::Expression new_expression) override;
 
    virtual void replace(const symbolic::ExpressionMapping& replacements) override;
};
 
class ConstPaddingNodeSerializer : public serializer::LibraryNodeSerializer {
public:
    nlohmann::json serialize(const data_flow::LibraryNode& library_node) override;
 
    data_flow::LibraryNode& deserialize(
        const nlohmann::json& j, builder::StructuredSDFGBuilder& builder, structured_control_flow::Block& parent
    ) override;
};
 
} // namespace tensor
} // namespace math
} // namespace sdfg